<template>
    <div>
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
        <el-card>
            <el-alert title="添加商品信息" type="info" center show-icon :closable="false">
            </el-alert>
            <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
                <el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClicked">
                    <el-tab-pane label="基本信息" name="0"> 
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_price"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类" prop="goods_cat">
                            <el-cascader
                                expand-trigger='hover'
                                v-model="addForm.goods_cat"
                                :options="cateList"
                                :props="cateProps"
                                @change="handleChange"></el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox :label="cb" v-for="(cb ,i) in item.attr_vals"
                                 :key="i" border></el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id" >
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <el-upload
                            :action="uploadURL"
                            :on-preview="handlePreview"
                            :on-remove="handleRemove"
                            list-type="picture"
                            :headers="headerObj"
                            :on-success="handleSuccess">
                            <el-button size="small" type="primary">点击上传</el-button>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                        <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        </el-card>
        <el-dialog
            title="图片预览" :visible.sync="previewVisible"
            width="50%">
            <img :src="previewPath" alt="" class="previewimg">
        </el-dialog>
    </div>
</template>

<script>
import _ from 'lodash'
export default {
    data() {
        return {
            activeIndex: '0',
            addForm: {
                goods_name: '',
                goods_price: 0,
                goods_weight: 0,
                goods_number: 0,
                goods_cat: [],
                pics: [],
                goods_introduc: '',
                attrs: []
            },
            addFormRules: {
                goods_name:[
                    {required: true, message: '请输入商品名称',trigger: 'blur'}
                ],
                goods_price: [
                    {required: true, message: '请输入商品价格',trigger: 'blur'}
                ], 
                goods_weight: [
                    {required: true, message: '请输入商品重量',trigger: 'blur'}
                ], 
                goods_number: [
                    {required: true, message: '请输入商品数量',trigger: 'blur'}
                ],
                goods_cat: [
                    {required: true, message: '请选择商品分类',trigger: 'blur'}
                ]
            },
            cateList: [],
            cateProps: {
                label: 'cat_name',
                value: 'cat_id',
                children: 'children'
            },
            manyTableData: [],
            onlyTableData: [],
            uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
            headerObj: {
                Authorization: 
                window.sessionStorage.getItem('token')
            },
            previewPath: '',
            previewVisible: false
        }

    },

    created() {
        this.getCateList();
    },

    methods: {
        async getCateList() {
          const { data: res } = await this.$http.get('/api/private/v1/categories');
          if(res.meta.status !== 200) {
            this.$message.error('获取商品分类数据失败！');
          }
          this.$message.success('获取商品分类数据成功');
          this.cateList = res.data;
        //   console.log(this.cateList);
        },
        handleChange() {
            // console.log(this.addForm.goods_cate);
            if(this.addForm.goods_cat.length !==3){
                this.addForm.goods_cat = [];
            }
        },
        beforeTabLeave(activeName,oldActiveName) {
            if(oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
                this.$message.error('请选择商品类型');
                return false;
            }
        },
        async tabClicked() { 
            if(this.activeIndex === '1') {
                const { data: res } = await this.$http.get(`/api/private/v1/categories/${this.cateId}/attributes`,
                {params: {sel: 'many'}});
                if(res.meta.status !== 200){
                    this.$message.error('获取商品动态参数失败！');
                } 
                // console.log(res.data);
                res.data.forEach(item => {
                    item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ');
                })
                this.manyTableData = res.data;
            }else if(this.activeIndex === '2') {
                const { data: res } = await this.$http.get(`/api/private/v1/categories/${this.cateId}/attributes`,
                {params: {sel: 'only'}});
                if(res.meta.status !== 200) {
                    return this.$message.error('获取静态属性失败！');

                }
                // console.log(res.data);
                this.onlyTableData = res.data;
            }
        },
        handlePreview(file) {
            console.log(file);
            this.previewPath = file.response.data.url;
            this.previewVisible = true;
        },
        handleRemove(file) {
            const filePath = file.response.data.tmp_path;
            const i = this.addForm.pics.findIndex(x =>x.pic === filePath);
            this.addForm.pics.splice(i,1);
            console.log(this.addForm);
        },
        handleSuccess(response) {
            // console.log(response);
            const picInfo = { pic: response.data.tmp_path };
            this.addForm.pics.push(picInfo);
            // console.log(this.addForm);
        },
        add() {
            this.$refs.addFormRef.validate(async valid =>{
                if(!valid) {
                    return this.$message.error('请填写必要的表单项！');
                }
               const form = _.cloneDeep(this.addForm);
                form.goods_cat = form.goods_cat.join(',');
                this.manyTableData.forEach(item =>{
                    const newInfo = {attr_id: item.attr_id,
                    attr_value: item.attr_vals.join(' ') };
                    this.addForm.attrs.push(newInfo);
                })
                this.onlyTableData.forEach(item =>{
                    const newInfo = {attr_id: item.attr_id,
                    attr_value: item.attr_vals};
                    this.addForm.attrs.push(newInfo);
                })
                 form.attrs = this.addForm.attrs;
                
                const { data: res } = await this.$http.post('/api/private/v1/goods',form);
                
                if( res.meta.status !== 201 ) {
                    return this.$message.error('添加商品信息失败！');
                }
                this.$message.success('添加商品信息成功');
                this.$router.push('/goods'); 
            })
        }
    },
    computed: {
        cateId() {
            if(this.addForm.goods_cat.length === 3) {
                return this.addForm.goods_cat[2];
            }
            return null;
        }
    }
}
</script>

<style lang="less" scoped>
.el-checkbox {
    margin: 0 10px 0 0 !important
}
.previewimg {
    width: 100%
}
.btnAdd {
    margin-top: 15px
}
</style>